Speaker
Julian Bautista
(Aix-Marseille Univ - CPPM)
Description
Peculiar velocities are a great probe of gravity allowing us to test the validity of general relativity on cosmic scales. I will describe the latest measurement of the growth rate of structures at redshift z = 0.07 using a combination of galaxy positions and direct peculiar velocities from the DESI Peculiar Velocity survey. Our measurements significantly contribute to constraining cosmological parameters encoding deviations from GR, such as the growth index.